Are there any other operating systems installed on the drive on which the currently running operating system is installed?Note: For example, if the currently running operating system is installed on the drive #0, which contains several partitions, and if one of the partitions contains Windows and another partition contains any additional operating system (e.g. Windows, Mac OS X, Linux, etc.), select 'Yes'.

As you are creating an outer volume, you should consider choosing 'No'. If you choose 'Yes', the default filesystem will be NTFS, which is not as suitable for outer volumes as FAT (for example, the maximum possible size of the hidden volume will be significantly greater if the outer volume is formatted as FAT). Normally, FAT is the default for both hidden and normal volumes (so FAT volumes are not suspicious). However, if the user indicates intent to store files larger than 4 GB (which the FAT file system does not allow), then FAT is not the default.

At the end of many drives, there is an area that is normally hidden from the operating system (such areas are usually referred to as Host Protected Areas). However, some programs can read and write data from/to such areas.WARNING: Some computer manufacturers may use such areas to store tools and data for RAID, system recovery, system setup, diagnostic, or other purposes. If such tools or data must be accessible before booting, the hidden area should NOT be encrypted (choose 'No' above).Do you want TrueCrypt to detect and encrypt such a hidden area (if any) at the end of the system drive?

CAUTION: ANY FILES CURRENTLY STORED ON THE PARTITION '%hs'X (I.E. ON THE FIRST PARTITION BEHIND THE SYSTEM PARTITION) WILL BE ERASED AND LOST (THEY WILL NOT BE ENCRYPTED)!Are you sure you want to proceed with format?

Error: Cannot set the keyboard layout for TrueCrypt to the standard US keyboard layout.Note that the password needs to be typed in the pre-boot environment (before Windows starts) where non-US Windows keyboard layouts are not available. Therefore, the password must always be typed using the standard US keyboard layout.

For security reasons, when a hidden operating system is running, local unencrypted filesystems and non-hidden TrueCrypt volumes are mounted as read-only (no data can be written to such filesystems or TrueCrypt volumes).Data is allowed to be written to any filesystem that resides within a hidden TrueCrypt volume (provided that the hidden volume is not located in a container stored on an unencrypted filesystem or on any other read-only filesystem).

It may happen that you are forced by somebody to decrypt the operating system. There are many situations where you cannot refuse to do so (for example, due to extortion). If you select this option, you will create a hidden operating system whose existence will be impossible to prove (provided that certain guidelines are followed). Thus, you will not have to decrypt or reveal the password to the hidden operating system. For a detailed explanation, please click the link below.

It may happen that you are forced by somebody to decrypt the operating system. There are many situations where you cannot refuse to do so (for example, due to extortion).Using this wizard, you can create a hidden operating system whose existence will be impossible to prove (provided that certain guidelines are followed). Thus, you will not have to decrypt or reveal the password for the hidden operating system.

It may happen that you are forced by somebody to reveal the password to an encrypted volume. There are many situations where you cannot refuse to reveal the password (for example, due to extortion). Using a so-called hidden volume allows you to solve such situations without revealing the password to your volume.

Note that the FAT file system is more suitable for outer volumes than the NTFS file system. For example, the maximum possible size of the hidden volume will very likely be significantly greater if the outer volume is formatted as FAT (the reason is that the NTFS file system always stores internal data exactly in the middle of the volume and, therefore, the hidden volume can reside only in the second half of the outer volume).Are you sure you want to format the outer volume as NTFS?

Note: If you are attempting to mount a partition located on an encrypted system drive without pre-boot authentication or to mount the encrypted system partition of an operating system that is not running, you can do so by selecting 'System' > 'Mount Without Pre-Boot Authentication'.

Note: The password will need to be typed in the pre-boot environment (before Windows starts) where non-US Windows keyboard layouts are not available. Therefore, the password must always be typed using the standard US keyboard layout. However, it is important to note that you do NOT need a real US keyboard. TrueCrypt automatically ensures that you can safely type the password (right now and in the pre-boot environment) even if you do NOT have a real US keyboard.